Shears.



J. R. SBARIGHT. SHBARS APPLIOATION FILED JULY 1e. 1909.

942,043. Patented Nov.3o,1909.

WITNESSES. .IJVVEV'TOR UNITED STATES PATENT OFFICE.

JOI-IN R. SEARIGrI-IT, 0F DETROIT, MICHIGAN, ASSIGNOR TO TI-IE DETROITSHEAR CGM- PANY, 0F DETROIT, MICHIGAN.

SHEARS.

eaaoas.

To all whom it may concern:

Be it known that I, JOHN R. SEARIGHT, citizen of the United States,residing at Detroit, county of layne, State of Michigan, have invented acertain new and useful Iniprovement in Shears, and declare the followingto be a full, clear, and exact description of the same, such as willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings, which fornia part of this specification.

This invention relates to shears for cutting heavy material.

It has for its object an improved auxiliary lever and a link connectionbetween the blades of the shears and the auxiliary lever, by whichincreased leverage is obtained and a greater control of the cuttingblades made possible.

In the drawings z-Figure 1, is a side elevation of the improved shears.Fig. 2, is a cross-section on the line raa in Fig. 1.

he two blades with their rear extensions or handles are pivotedtogether. The blades 1 and 2 are pivoted at 13. rlhe blade 1 has anextension 3 terminating with a thumb ring 4. The blade 2 has anextension 5 and near its terminal a pivot 6, by which is pivoted to theextension 5 a pair of links 7 and 8, one of which engages on each sideof the pivot end of the auxiliary handle lever 9, which terminates withthe hand ring 10. rThe rear extension 3 immediately at the rear of thepivot 13 broadens and is provided with a pivot hole for pivot 14, whichis located at the rear of the pivot 13 and is substantially in line withthe cutting edge of the blade 1. The pivot end of the auxiliary lever 9is broadened, and that edge of it which lies to the front is inclined tothe axis of the lever, assuming the axis to run from the center of thepivot 14 through the hand ring 10, along approximately the middle lineof the hand ring 10. On the point which is distant from the pivot 14 isa pivot hole for the second pivot 15. The pivots 6 and 15 are joined bylinks 7 and 8, one on each side of the broad pivot end of the auxiliarylever 9. Along that edge of the auxiliary lever which lies between thepivot 14 and the hand ring are ribs 19 and 20 along the edge of themember on each side thereof to furnish a bearing which lifts the linkolf from the main tabular surface of the lever.

Specification of Letters Patent.

Application filed July 16, 1909.

Patented Nov. 30, 1909.

Serial No. 507,898.

At this pivot 15 under each link 7 and 8 is a raised boss similar to awasher but preferably fixed to the auxiliary lever, the raised boss 21on one side holding the link 7 from contact with the greater part of thetabular surface of the member and the raised boss 22 on the oppositeside of the member holding the link S away from the main part of thetabular surface of the member. The two links 7 and 8 co-acting with thepivots 6 and 15 control the action of the blade 2 so that the user ofthe shears can hold the two cutting blades in their proper relation forthe proper shearing work for which the tool is intended.

The action of the shears linked in the way shown in the drawing and inthe manner described, has been heretofore described in my applicationNo. 462,593, filed by me November 14, 1908. I have found in'practicaldevelopment of the invention that the single link there shown was notadequate to prevent the improper twisting of one shear blade withrespect to the other, and I have found that when double links were usedit affords a proper and sufficient control to prevent such twistingmotion of one blade with respect to the other.

lVhat I claim is A shearing tool, having in combination a main blade, ashearing blade pivoted thereto, an auxiliary lever provided with a handring, pivoted at its end to the main blade, and a pair of link memberspivoted at one end of each on the opposing faces of that portion of theshearing blade remote from its cutting portion, and at the other end ofeach on the sides of the auxiliary lever, at a. point so located thereonwith respect to its point of pivoting to the main blade that the axialline passing through the two pivots on the main blade is traversedthereby when the implement is opened and closed, said pair of linkmembers serving to equalize and distribute between the two faces of theshearing blade the strain incident to the operation of the shearingmembers upon an interposed sheet of metal, substantially as described.

In testimony whereof, I sign this specification in the presence of twowitnesses.

JOHN R. SEARIGHT.

Witnesses CHARLES F. BURTON, VIRGINIA C. SrRA'r'ix

